Fixed crash in RenderSystem::shutdown due to the notifications being sent to already destructed render targets
Fixed crash in RenderSystem::shutdown due to the notifications being sent to already destructed render targets

paroj/ogre,OGRECave/ogre,OGRECave/ogre,paroj/ogre,OGRECave/ogre,paroj/ogre,paroj/ogre,OGRECave/ogre,OGRECave/ogre,paroj/ogre